Potting soil is a type of soil used for growing plants in containers. It is usually composed of a combination of LOAM, EARTH, sand, and organic matter. LOAM is a type of soil that is made up of clay, silt, and sand particles, and is known for its ability to hold water and nutrients. EARTH is a general term for soil, and is composed of organic matter, minerals, and other materials. Together, these two components form the basis of potting soil, providing the necessary nutrients and moisture for plants to thrive.